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IMD and PSK31

Submitted by kd5ten on November 17, 2007 - 01:09

IMD stands for inter-modulation distortion and is a measurement of the first set of unwanted sidebands on a PSK31 transmission to the desired ones. It is then measured in decibels. Generally, a -30dB is considered a excellent IMD, while -20dB is a poor transmission.